Definitive Division of the Roman Empire

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After the death of Theodosius I, the last Emperor of the whole Roman Empire, the empire was divided between his two sons in a Western and Eastern part.

Chronology

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January 395: Before Roman emperor Theodosius' death, he divided the Empire between his two sons: the eastern part went to Arcadius, the western part to Honorius. This division was, from a formal point of view, only administrative, since the Empire was still one, but it was also an important event in Roman history, as never again did an emperor reign over the West and the East at the same time.